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Subject[PATCH 1/4] ARM: LPC32xx: Set system serial based on cpu unique id
Date
From: Alexandre Pereira da Silva <aletes.xgr@gmail.com>

LPC32xx SoC has a 128 bits unique id that can be used as a system
serial number, if none has been provided by atags or dt.

Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@gmail.com>
Signed-off-by: Roland Stigge <stigge@antcom.de>
---
arch/arm/mach-lpc32xx/common.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- linux-2.6.orig/arch/arm/mach-lpc32xx/common.c
+++ linux-2.6/arch/arm/mach-lpc32xx/common.c
@@ -26,6 +26,7 @@
#include <linux/io.h>

#include <asm/mach/map.h>
+#include <asm/system_info.h>

#include <mach/hardware.h>
#include <mach/platform.h>
@@ -224,7 +225,7 @@ void lpc23xx_restart(char mode, const ch
;
}

-static int __init lpc32xx_display_uid(void)
+static int __init lpc32xx_check_uid(void)
{
u32 uid[4];

@@ -233,6 +234,11 @@ static int __init lpc32xx_display_uid(vo
printk(KERN_INFO "LPC32XX unique ID: %08x%08x%08x%08x\n",
uid[3], uid[2], uid[1], uid[0]);

+ if (!system_serial_low && !system_serial_high) {
+ system_serial_low = uid[0];
+ system_serial_high = uid[1];
+ }
+
return 1;
}
-arch_initcall(lpc32xx_display_uid);
+arch_initcall(lpc32xx_check_uid);

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